how to serialize the entire directory structure in json...

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C#

hi to all..

actuually wat happend means..i create sample folder in 'D' and in that i created SAMPLE FOLDER ,again i created HELLO FOLDER and one .txt file, in that HELLO FOLDER i created two .txt files..
in that code i take default path like "D:\sample" the above entire directory structure displayed like as a string..
string is like this: abc.txt hello xyz.txt pqr.txt..
now i want to serilaize the entrire directory structure and i want the output like this:
{"Root":"d:\\"{"mainfolder":"sample","mfile":"abc.txt","subfolder":"hello"{"hfile1":"xyz.txt","hfile2":"pqr.txt"}}}..
if any body knows pls let me know..
thanks in advance..